<template>
  <div>
  

     <qrcode-stream :camera="camera" @decode="onDecode" @init="onInit">
          <div>
              <div class="qr-scanner">
                  <div class="box">
                      <div class="line"></div>
                      <div class="angle"></div>
                  </div>
                  <div class="txt" style='color:#fff;font-weight:bold'>
                      将二维码/条码放入框内，即自动扫描
                      <!--div class="myQrcode">我的二维码</div-->
                  </div>
              </div>
          </div>
      </qrcode-stream>
  </div>
</template>

<script>
// 下载插件
// cnpm install --save  vue-qrcode-reader

// 引入
import { QrcodeStream } from 'vue-qrcode-reader';

export default {
  // 注册
  components: { QrcodeStream },
  data() {
      return {
          result: '', // 扫码结果信息
          error: '', // 错误信息
          // show: false,
          // qrcode: false,
          qrcode: true,
          torchActive: false,
          camera: 'auto',
          urls:""
      };
  },

  methods: {
      onInit (promise) {
        promise
            .catch(console.error)
            .then(this.resetValidationState)
        },

        resetValidationState () {
        this.isValid = undefined
        },

        async onDecode (content) {
            this.result = content;
            
            this.turnCameraOff()

            // pretend it's taking really long
            await this.timeout(1000)
            this.isValid = content.startsWith('http')

            // some more delay, so users have time to read the message
            await this.timeout(1000)

            this.turnCameraOn()
            this.$emit("decode",content)
        },

        turnCameraOn () {
        this.camera = 'auto'
        },

        turnCameraOff () {
        this.camera = 'off'
        },

        timeout (ms) {
        return new Promise(resolve => {
            window.setTimeout(resolve, ms)
        })
        }
  },
};
</script>
<style scoped>
.error {
  font-weight: bold;
  color: red;
}
.cameraMessage {
  width: 100%;
  height: 60px;
}
.qr-scanner {
  background-image: linear-gradient(
          0deg,
          transparent 24%,
          rgba(32, 255, 77, 0.1) 25%,
          rgba(32, 255, 77, 0.1) 26%,
          transparent 27%,
          transparent 74%,
          rgba(32, 255, 77, 0.1) 75%,
          rgba(32, 255, 77, 0.1) 76%,
          transparent 77%,
          transparent
      ),
      linear-gradient(
          90deg,
          transparent 24%,
          rgba(32, 255, 77, 0.1) 25%,
          rgba(32, 255, 77, 0.1) 26%,
          transparent 27%,
          transparent 74%,
          rgba(32, 255, 77, 0.1) 75%,
          rgba(32, 255, 77, 0.1) 76%,
          transparent 77%,
          transparent
      );
  background-size: 3rem 3rem;
  background-position: -1rem -1rem;
  width: 100%;
  /* height: 100%; */
  height: 100vh;
  /* height: 288px; */
  position: relative;
  background-color: #1110;

  /* background-color: #111; */
}
/* .qrcode-stream-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 82px;
  clear: both;
} */
/* .qrcode-stream-wrapper >>> .qrcode-stream-camera {
  width: 213px;
  height: 210px;
  clear: both;
  margin-top: 39px;
} */
.qr-scanner .box {
  width: 213px;
  height: 213px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  overflow: hidden;
  border: 0.1rem solid rgba(0, 255, 51, 0.2);
  /* background: url('http://resource.beige.world/imgs/gongconghao.png') no-repeat center center; */
}
.qr-scanner .txt {
  width: 100%;
  height: 35px;
  line-height: 35px;
  font-size: 14px;
  text-align: center;
  /* color: #f9f9f9; */
  margin: 0 auto;
  position: absolute;
  top: 70%;
  left: 0;
}
.qr-scanner .myQrcode {
  text-align: center;
  color: #00ae10;
}
.qr-scanner .line {
  height: calc(100% - 2px);
  width: 100%;
  background: linear-gradient(180deg, rgba(0, 255, 51, 0) 43%, #00ff33 211%);
  border-bottom: 3px solid #00ff33;
  transform: translateY(-100%);
  animation: radar-beam 2s infinite alternate;
  animation-timing-function: cubic-bezier(0.53, 0, 0.43, 0.99);
  animation-delay: 1.4s;
}

.qr-scanner .box:after,
.qr-scanner .box:before,
.qr-scanner .angle:after,
.qr-scanner .angle:before {
  content: '';
  display: block;
  position: absolute;
  width: 3vw;
  height: 3vw;

  border: 0.2rem solid transparent;
}

.qr-scanner .box:after,
.qr-scanner .box:before {
  top: 0;
  border-top-color: #00ff33;
}

.qr-scanner .angle:after,
.qr-scanner .angle:before {
  bottom: 0;
  border-bottom-color: #00ff33;
}

.qr-scanner .box:before,
.qr-scanner .angle:before {
  left: 0;
  border-left-color: #00ff33;
}

.qr-scanner .box:after,
.qr-scanner .angle:after {
  right: 0;
  border-right-color: #00ff33;
}

@keyframes radar-beam {
  0% {
      transform: translateY(-100%);
  }

  100% {
      transform: translateY(0);
  }
}
</style>